File-sharpening machine.



G. M. EMERSON.

FILE SHARPENING MACHINE.

APPLICATION FILED APR. 3, 1909.

Patented Jan. 11, 1910.

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CHARLES EMER SON, OF COLUMBUS, 0HIO.

FILE-SHARPENING MACHIN E.

Specification of Letters Patent. Patented Jan. 11, 1916.

7 Application filed April 3, 1909., Serial No. 487,690.

To all whom it may concern:

Be it known that I, CHARLES M. EMER- SON, a citizen of the UnitedStates, residing at Columbus, in the county of Franklin and State ofOhio, have invented certain new and useful Improvements inFile-Sharpening Machines, of which the following is a specification.

My invention relates to theimprovement of file sharpening machines ofthat class in which the sharpening of the file is attained by forcingabrasive material against its cutting surfaces.

The objects of my invention are to provide an improved file sharpeningmachine of this class of improved construction and arrangement of parts;to provide improved means for assuring the constant support of the upperand lower nozzles at fixed angles or inclinations; to provide improvedmeans for engaging and holding files of difierent sizes or the tangs ofwhich are of different degrees of taper; to provide improved means foradjustingthe file to, different positions for receiving theabrasivematerial and to produce other improvements which will be morefully pointed out 'hereinafterr These objects I accomplish in the mannerillustrated in the accompanying drawing, in

which: I

Figure 1 is a view in perspective of my improved file sharpeningmachine, and, F i 2 is a vertical longitudinal section throug the steamnozzles and parts in the same plane.

Similar numerals refer to similar parts throughout the several views.

In carrying out my invention, I employ an upright framework, whichpreferably comprises connected front and rear standards such as areindicated at 1 and 2. The upper portions of these standards support,

as shown, an elongated casing or box 3,

which as indicated in the drawing, has its bottom portiorifinclinedtoward its forward end and which-is provided on its upper side with asuitable steam outlet 4. The forward end of the casing or box 3 hasformed therewith, a forward extension 5, in the outer face of which isformed an opening 6 of suitable size, said opening having pro ect ingfrom its upper and opposite sides a hood or shield 7.

In the lower portion of the framework, beneath the forward portion ofthe casing 3, I provide a receptacle 8'having an open upper side andadapted to receive'and sup- .port suitable abrasive material in a liquidor semi-liquid state.

In funther carrying out my invention, I employ a file holding mechanismwhich comprises among other parts an angular rod consisting of thehorizontal arm 9 and its forward upturned arm 9 The horizontal arm 9bears, as shown, between rollers 10 which are carried between brackets11 which project from horizontal frame cross pieces at the front andback of the framework. This slidably mounted support is provided at theupper end of'its arm 9 with a head 12, which comprises a verticallydisposed disk like extension 12 having teeth formed on its inner orrearface.

With the teeth of the member 12 are adapted to engage the teeth of asimilar member or head 13, formed on or connected with the outer .endsof two rearwardly extending parallel arms 13, one of which is disclosedin Fig. 1 of the drawing, and the remaining one of which is shown inFig. 2 thereof; The engaging members 13 and 12 are held in properengagement one with the other through the medium of a bolt 14 whichpasses loosely through said members,

pivoted one above the other, as shown at 16,

file retaining fingers 16, the latterextending to and terminatingat adesirable point in front of the opening 6 of the casingB. The undersideof the outer end portion of the upper finger and the upper side of theouter end portion of the lower finger, are formed with transverseopposing recesses having contracted months or entrances and each ofthese recesses is adapted to receive and movably hold the roundedtransverse projection or tongue 17 of a clamping plate 17, said clampingplates'being adapted to have inserted between them, the tang or shank ofa file 18, such as is indicated in' the drawing.

In order to insure the clamping of the members 17 against oppositesides,of. the file tang, I provide between the outer ends of the'fingers 16 acam body 19 which is carried on a transverse pin 20 journaled in themembers 13 and which in is provided on one end with a depending handle21.

It will be understood that said handle may cated projecting portions ofthe cam member into contact with the adjoining faces of the fingers 16and thereby cause a clamping action of the members 17 against the filetang sufliciently to rigidly hold sa1d file in the position shown in thedrawing, wherein it will be observed that said file is by movement ofthe-support 99" adapted to be projected to a greater or less degreewithin the casing 3.

22 represents a vertical steam conductlng pipe which leads from anysuitable source of steam supply and which, as shown in the drawing, isadapted to be supported at one side of the forward end of the casing 3by means of a laterally extending frame bracket 23. Leading laterallyfrom the steam pipe 22 to' points in front of the opening 6 of thecasing, are short pipe arms 24, these pipe arms being arrangedrespectively above and below the file holding means and. arerespectively connected with nozzle pipe arms 25 and 26, each of which asshown in the drawing, preferably consistin of short pipe sections unitedby coupllng sleeves 27. These nozzle arms 25 and 26 are inclinedrespectively downward and upward toward their outer ends and i areprojected into the opening 6 of the cas-- ing. Each of the outersections of the nozzle arms, which are indicated respectively at 25 and26*, has its central passage contracted or formed with an internall ingnozzle 28 having a comparative small opening, which internal nozzleprojects within an end enlargement of the bore of the'nozzle armsection, which enlargement also receives a discharging nozzle member 29having flaring end openings, as shown. Two corresponding sleeves 27 ofthe nozzle arms are connected rigidly by the parallel arms of aconnecting yoke 30 and into one side ofveach of the nozzle arm sections25 and 26 lead respectively vertical pipes 31- and 32, said pipesleading into said nozzle arm sections at the points therein in which theinternal nozzles 28 are formed. The lower endsof the pipes 31 and 32connect with an oblong box 33in front of the lower portion of the casing3 and with the underside of this box, connecttwo pipes 34 which leaddownward into the abrasive material tank or receptacle 8.

In the lower forward portion of the easing 3, I provide an outlet fromwhich ex-' tends downwardly a shortd iseharge pipe 35. In utilizing mydevice, the file to be shar ened is held, as shown and described,

rigi 1y betweenthe clamping members 17, the body of the file bein thussu ported between the terminal nozz es 29 of t e nozzle pipe arms.

- It will be understood that steam under pressure from the pipe 22entering and pass- 1ng through the nozzle pipe arms and taperthrough theterminal nozzles 29 thereof, will ereate 'a suction in the pipes 31, 32and 34, which will result in the abrasive material contained in thereceptacle 8 being drawn into the nozzle pipe arms immediately in frontofthe contracted internal nozzle 28, said abrasive material being thusforced by the steam athigh speed against the upper and lower faces ofthe file simultaneously, the action of the abrasive material against theteeth of the file, serving to sharpen the same rapidly and uniformly. Itis essential for the proper sharpening operation, however, as will bereadlly understood, that the predetermined inclination of thedischarging nozzles 29 must be at all times main tained, as a variationof these angles will result in the teeth of the file receiving the blastof abrasive material at an improper angle. It will be understood thatany variation in the positions or inclinations of the dischargingnozzles, will be prevented through the employment of the rigidconnecting yoke 30. By moving the angular rod 99 inward and outwardbetween its bearing rollers, it is obvious that the entire upper andlower surfaces of the file may be subjected to the action of the blastsfrom the nozzles.

Owing to the employment of the adjustable connected toothed members 12and 13*, it is obvious that the surfaces of the file to be acted upon,may be readily changed by first turning the finger nut 15 outward, thenseparating said members 12* and 13, turning the latter until the file isin the desired position and again clamping said toothed parts together.i

Owing to the inclination of the underside of the casing 3, it is obviousthat the abrasive material discharged within the casing,

will find an outlet through the pipe 35 which is in the lower portion ofthe casing and that from said pipe the abrasive material will bereturned to the casing 8.

What I claim, is: l

1. In a file sharpening machine, the combination with a framework, asteam supply pipe, nozzle carrying pipe arms leading from said supplypipe and converging toward their outer'ends, and pipes leadingfrom asupply of abrasive material to said nozzlev pipe arms, of a file holdercomprising pivot-- ed fingers, the adjoining faces of said fingershaving rounded transverse recesses, clamping plates havingroundedprojections adapted to movably engagesa1d finger recesses, meansfor forcing sa d clamping fingers toward each other, and means forsupporting and moving said clamping fingers between said nozzle pipearms.

2. In a file sharpening machine, the combination with a framework, tworigidly connected converging nozzle pipe arms and connections with saldarms for supplying the amaze same with steam under ressure and with her13, and means for detachably connecting abrasive material, of a 1eholding device said toothed members. 10 adapted to engage and hold thetang of a In testimony whereof I afiix my signature file, said fileholdmg device having a toothed in presence of two witnesses.

member 13, and a supporting member hav CHARLES M. EMERSON.

ing a traveling support in said framework, Witnesses said supportingmember having a toothed A. L. PHELPS,

head 12 adapted to engage the toothed mem- L. CARL STOUGHTON.

